INA186A5QDBVRQ1

Overview

The INA186A5QDBVRQ1 is an automotive-grade, bidirectional current-sense amplifier with a fixed gain of 500 V/V. It operates on a single supply from 1.7 V to 5.5 V and supports common-mode voltages from -0.2 V to +40 V. The device features a typical quiescent current of 48 µA and input bias current of 0.5 nA. It offers a minimum CMRR of 120 dB and a maximum gain error of ±1%. The component is qualified under AEC-Q100 standards for Grade 1 temperature range (-40°C to +125°C) and housed in a SOT-23-5 package.

Feature Summary

• Bidirectional sensing capability enabled by external reference voltage application
• Ultra-low input bias current allowing use of larger sense resistors
• Zero-drift architecture providing high precision at light loads
• Functional safety capable with documentation available for system design

Applications

• Body control module (BCM)
• Telematics control unit
• Emergency call (eCall)
• 12-V battery management system (BMS)
• Automotive head unit

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification and the 'A5' indicates the 500 V/V gain setting. Ensure the DBVR package designation matches the required SOT-23-5 form factor. Confirm that the datasheet revision aligns with the latest functional safety documentation requirements for your target application.

Selection Notes

Select this part when high gain is required for microamp-level current monitoring. The 500 V/V gain suits applications where the shunt voltage drop must be significantly amplified for ADC reading. Consider the low quiescent current for battery-powered systems and verify that the 40 V common-mode range covers the bus voltage spikes expected in the vehicle environment.

Part Context

This component belongs to the INA186-Q1 family of high-precision current sense amplifiers designed for cost-sensitive automotive systems. Unlike other members of the series such as the INA186A1 or A3 which offer lower gains, the A5 variant provides the highest fixed amplification factor. It shares the same low-power topology and robust common-mode rejection characteristics as its siblings.

Replacement Considerations

INA186A5QDRVRQ1